Is it possible to set all characters in all vertex groups to lowercase?
It just so happens that I have a snippet of python that does exactly that:
import bpy
from bpy import context as C
import re

for vg in C.active_object.vertex_groups:
    new_name = vg.name.lower()
    print(vg.name, '-&gt;', new_name)
    if new_name != vg.name:
        vg.name = new_name